138887510 has 32 divisors (see below), whose sum is σ = 254735712. Its totient is φ = 54512640.

The previous prime is 138887477. The next prime is 138887513. The reversal of 138887510 is 15788831.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138887513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126524 + ... + 127616.

It is an arithmetic number, because the mean of its divisors is an integer number (7960491).

Almost surely, 2^138887510 is an apocalyptic number.

138887510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138887510 is a deficient number, since it is larger than the sum of its proper divisors (115848202).

138887510 is a wasteful number, since it uses less digits than its factorization.

138887510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 138887510 is about 11785.0545183296. The cubic root of 138887510 is about 517.8703705086.

The spelling of 138887510 in words is "one hundred thirty-eight million, eight hundred eighty-seven thousand, five hundred ten".